<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Get the current handler for specified signal</title>
 </head>
 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.pcntl-signal-get-handler" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">pcntl_signal_get_handler</h1>
  <p class="verinfo">(PHP 7 &gt;= 7.1.0)</p><p class="refpurpose"><span class="refname">pcntl_signal_get_handler</span> &mdash; <span class="dc-title">Get the current handler for specified signal</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.pcntl-signal-get-handler-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>pcntl_signal_get_handler</strong></span>
    ( <span class="methodparam"><span class="type">int</span> <code class="parameter">$signo</code></span>
   ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">
   The <span class="function"><strong>pcntl_signal_get_handler()</strong></span> function will get the current handler for the specified <code class="parameter">signo</code>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.pcntl-signal-get-handler-parameters">
  <h3 class="title">参数</h3>
  <dl>

   
    <dt>
<code class="parameter">signo</code></dt>

    <dd>

     <p class="para">
      The signal number.
     </p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.pcntl-signal-get-handler-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   This function may return an integer value that refers to <strong><code>SIG_DFL</code></strong> or <strong><code>SIG_IGN</code></strong>.  If you set a custom handler a string value containing the function name is returned.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.pcntl-signal-get-handler-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>7.1.0</td>
      <td>
       <span class="function"><strong>pcntl_signal_get_handler()</strong></span> has been added.
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 examples" id="refsect1-function.pcntl-signal-get-handler-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4327">
    <p><strong>Example #1 <span class="function"><strong>pcntl_signal_get_handler()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">pcntl_signal_get_handler</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;Outputs:&nbsp;int(0)<br /><br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">pcntl_test</span><span style="color: #007700">(</span><span style="color: #0000BB">$signo</span><span style="color: #007700">)&nbsp;{}<br /></span><span style="color: #0000BB">pcntl_signal</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'pcntl_test'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">pcntl_signal_get_handler</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;Outputs:&nbsp;string(10)&nbsp;"pcntl_test"<br /><br /></span><span style="color: #0000BB">pcntl_signal</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">SIG_DFL</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">pcntl_signal_get_handler</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;Outputs:&nbsp;int(0)<br /><br /></span><span style="color: #0000BB">pcntl_signal</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">SIG_IGN</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">pcntl_signal_get_handler</span><span style="color: #007700">(</span><span style="color: #0000BB">SIGUSR1</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;Outputs:&nbsp;int(1)<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.pcntl-signal-get-handler-seealso">
  <h3 class="title">参见</h3>
  <ul class="simplelist">
   <li class="member"><span class="function"><a href="pcntl_signal.html" class="function" rel="rdfs-seeAlso">pcntl_signal()</a> - 安装一个信号处理器</span></li>
  </ul>
 </div>


</div></div></div></body></html>